Richardson House, Flat 2, 13 Malting Way, Isleworth, TW7 6SD

Richardson House is a one-bedroom semi-detached house in Isleworth (TW7 6SD). It has a recorded floor area of 51 m² (around 549 sq ft) and construction records dating it to 1991-1995. At 51 m² this is the 5th smallest of 16 units on EPC record in Richardson House, where floor areas span 49–63 m². The building's EPC ratings span D to C, with this unit at the bottom. On EPC score it ranks last in the building (64 versus a best of 79). The latest certificate (July 2024) shows a D (score 64), on the cusp of jumping into the C band. Earlier certificates rated it C (March 2014); the latest reading is one band lower. Between certificates, hot-water efficiency dropped from Good to Average and lighting dropped from Average to Very Poor. The recommended improvements would push it to C (score 75).

On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. On the market in May 2014 and unlisted since — roughly 12 years. Across the public record there are 4 sales, relatively high churn for a single property. Across 1996–2014, sale prices on this property compounded at 8.2% per year. Today's modelled estimate of £311,000 is 17.4% above the 2014 sale price. On a £-per-square-foot basis, the last sale (£483/sq ft) was about 109.5% above the typical sold price in the postcode.